Microsoft Outlook 2019, Microsoft Outlook 2016, Microsoft Outlook 2013, Microsoft Outlook 2010, and Outlook for Office 365
On the **File **tab, click Options.
In the **Outlook Options **dialog box, click Advanced.
In the **Other **section, select the Enable troubleshooting logging (requires restarting Outlook) check box, and then click OK.
Exit and then restart Outlook.